lake meaning
EN
[leɪk] [-eɪk] 
UK US WLake
- A lake (in Scotland and Ireland they can be called a loch) is an area (prototypically filled with water, also of variable size), localized in a basin,
- Natural lakes are generally found in mountainous areas, rift zones, and areas with ongoing glaciation. Other lakes are found in endorheic basins or along the courses of mature rivers.
- Many lakes are artificial and are constructed for industrial or agricultural use, for hydro-electric power generation or domestic water supply, or for aesthetic or recreational purposes.
EN Lake 
- NounPLlakes
- (now chiefly dialectal) A small stream of running water; a channel for water; a drain.
- A large, landlocked stretch of water.
- Judge Short had gone to town, and Farrar was off for a three days' cruise up the lake. I was bitterly regretting I had not gone with him when the distant notes of a coach horn reached my ear, and I descried a four-in-hand winding its way up the inn road from the direction of Mohair.
- A large amount of liquid; as, a wine lake.
- (obsolete) An offering, sacrifice, gift.
- (dialectal) Play; sport; game; fun; glee.
- (obsolete) Fine linen.
- In dyeing and painting, an often fugitive crimson or vermillion pigment derived from an organic colorant (cochineal or madder, for example) and an inorganic, generally metallic mordant.
- (now chiefly dialectal) A small stream of running water; a channel for water; a drain.
- VerbSGlakesPRlakingPT, PPlaked
- More Examples
- Used in the Middle of Sentence
- These included other Niphargus species from deep cave lakes and coastal anchihaline caves [23 ] and Gammarus and Echinogammarus amphipods that live only in permanently watered streams [21 ,24 ].
- Well, last summer, I was out that way among the lakes that lie sleeping in beauty, and along the streams that flow through the old woods, playing the savage and vagabondizing in a promiscuous way.
- As backwater from Lake Erie raises the level of Lake St. Clair, so backwater from Lake St. Clair raises the level of Lake Michigan-Huron.
- Used in the Ending of Sentence
- We saw a water devil form in the late afternoon on the lake.
- He’s on Klamath Lake; he often fishes from that lake.
- This pattern can be explained by seasonal differences in the strength of microstratification at the surface of the lake.
- Used in the Middle of Sentence
Definition of lake in English Dictionary
- Part-of-Speech Hierarchy
- Nouns
- Countable nouns
- Countable nouns
- Verbs
- Nouns
Source: Wiktionary
Grammatically, this word "lake" is a noun, more specifically, a countable noun. It's also a verb.